I have no answer for you, but had an incident recently where I sent my batik quilt off to a quilter in another city. I bought my wide backing at Joann's and even washed the backing to get some of the sizing out. Well, she returned it to me and said she tried to quilt it and her stitches kept skipping and she changed needles several times, but she just couldn't do it; felt I wouldn't be happy with the results which I wouldn't have. She didn't charge me anything, but now I have an unfinished quilt just sitting here and I'm not sure what I'm going to do with it. Don't know if it was the top or backing that was the problem so I'm thinking another backing for it.